Automatic coupling unit for investigation of well

FIELD: oil and gas industry.

SUBSTANCE: automatic coupling unit is equipped with the cylinder connected to hook sleeve, and a spring. Guide and mating parts are provided in the cylinder with possibility of engagement with the hook sleeve. The latter is installed on the contact housing fixed in the housing representing a cylindrical part so that sleeve is pressed to the housing by means of a spring. At that, fluoroplastic insulating tube and a pin is installed in the contact housing. Pin is connected to cable clamp connected to the first cable head by means of logging information cable. Measuring instrument is suspended on the cable which is connected to non-return valve. Cylinder is fixed on the second cable head.

EFFECT: enlarging functional capabilities owing to performing the investigation without stopping the well by automatic coupling unit; improving its reliability.

1 dwg

 

The invention relates to the oil and gas industry, in particular the geophysical devices and methods for exploration wells, and can be used for exploration wells under the current artificial lift device without stopping the equipment.

There is a method of research wells (RF patent No. 2384698, EV 47/10, G01V 5/04, 20.03.2010), including the equipment of the well casing tubing, the injection of the working agent string of tubing into the reservoir for 3 or more days, stop wells, conducting technological exposure within 1-2 days, gamma logging and thermometry of the column tubing for the registration of the background curve of the temperature distribution along the depth of the well, pumping the first disturbing amount of water through the column tubing or annular space into the reservoir, re-borehole thermometry and check the curve of the temperature distribution along the borehole depth, analyzing data and making conclusions about the state of the well, while the base of the column tubing is placed above the top of the perforated interval 10-30 m, when pumping disturbing amount of water repeatedly move the devices from the borehole bottom to the interval set at 40-60 m above the base of the Colo is by tubing, at different speeds and record the readings of the flow meter, resume water injection and water injection lift devices to the wellhead with the registration of the readings of thermometer and flow meter, pump the second disturbing amount of water and record infrared images around the wellbore after 5-10 min after stopping the injection.

The disadvantage of analog is the complexity of the method and limited functionality due to the shutdown of wells for the study.

Known automatic coupling device for connecting the piston rod of the pump with a column of rods in the study wells (RF patent No. 31397, EV 17/02, 10.08.2003)containing a bushing associated with the plunger performed in the upper part of the groove, the collet with petals and a shank with a tapered part connected to the coupling with the column rods, and the ends of the petals collets are jagged ledges towards the centre, and the tapered portion of the shank is made of corrugated.

The disadvantage of analogue is the limited functionality of the coupler due to the stop of the equipment when performing research.

The closest in technical essence and the achieved technical result of the claimed is a method of measuring downhole parameters (the home is and the Russian Federation No. 2008130459, EV 45/00, 27.01.2010), including the descent into the production casing of the pumping wells, with one or more layers on the string of pipe corresponding underground layout for exploration or exploitation, and at least one of the measuring system in the form of a measuring transducer with independent transmitter and receiver, with a wet upper end, and is placed in the housing with open or closed passage and descend into the production casing of the well together with the underground layout, and includes an eccentric on the depth or above, or below at least one of the investigated layer, and measuring transducer with a transmitter for inclusion in the work registers in time to the corresponding well depth parameters of the environment: any urban environment - the injection of the working agent into the reservoir or flow rate of fluid from the reservoir, or pressure, or differential pressure, with or without temperature, and then transmits the measured values to the receiving device by direct contact, through a connection between their wet the lower and upper ends, while the receiving device is in the form of removable Autonomous receiver down into the well with the help of cable equipment and ensure its contact with the measuring device, the connection between a wet bottom and top ends.

The disadvantage is near what about the analogue is the complexity of the method and limited functionality, due to the absence of the possibility of longitudinal displacement measuring instrument along the borehole during the study and measurement of natural gamma-ray activity of the surrounding rocks.

The closest in technical essence and the achieved technical result of the claimed device is an automatic coupling device (patent RF №67167, EV 17/02, EV 17/06)consisting of connected with a pump of a hook, provided with a locking protrusion, and the trap containing the cylinder on the inner surface of which is made screw-thread, passing in the oval locking groove under the castle ledge, sleeve, guide means, spring and tube.

The disadvantage of the closest analogue is the limited functionality of the coupler due to the stop of the equipment when performing research, and the low reliability of the device in the mode of operating the well.

The objective of the invention is the extension of functionality by conducting research without downtime by automatically coupling under the current system of mechanized production.

The problem is solved also by the fact that in an automatic coupling device for exploration wells containing cylinder connected to the sleeve of a hook, spring, according from what retenu in the guide cylinder is made and mate with the possibility of engagement with the sleeve, a hook, which is installed on the body of the contact, fixed in the housing, which is a cylindrical part, so that the sleeve is pressed against the spring case, while in the case of the contact set fluoropolymer insulating tube and a rod associated with a cable clamp connected to the first cable head through logging data cable, which is suspended from the measuring device and which is connected with a check valve, and a cylinder mounted on the second cable head.

The invention is illustrated by a drawing of the General form (1).

Automatic drawbar (figure 1) contains a receiver case 1, located in the bore and coupled by coupling with 2 centralizer 3, through which is fixed to the electric submersible pump (ESP), tubing (tubing) 4 fixed in the housing of the receiver 1. Channel ESP - Adapter - receiver - Pipe tubing is designed to supply fluid to the wellhead. In the case of the receiver 1, the saddle 5 reinforced threaded and sealed with two rubber o-rings 6. In the saddle 5 and the conical surface has a nipple 7. The nipple 7 is threaded for mounting in the housing of the receiver 1 and two sealing rings 6, the inside of the nipple 7 is made the hole for logging data cable 8. To install the seal is 9 in the case of the receiver 1 is screwed into the bolt 10, and to prevent the flow of fluid in the emergency channel is made non-return valve 11. The nipple 7 has a housing 12, which is a cylindrical part, which is fixed to the first cable head 13. Between the first cable head 13 and the housing 12 is installed first washer 14. The sleeve 15 is installed between the first and second washers 14, in which the cable clamp 16. In case 12 screwed in the body of the pin 17 and is sealed by two rings 18. In case of contact 17, before screwing into the housing 12, mounted sleeve of a hook 19, the stop 20, the sleeve 21, the spring 22, washer 23, which rests on the housing 12 under the action of the spring 22. In the case of the pin 17 is installed fluoropolymer insulating tube 24 and the rod 25 connected with cable clamp 16 which is connected with the first cable head 13 by means of logging information cable 8, which is suspended from the measuring device 26. On the second cable head 27 is fixed to the cylinder 28 connected to the sleeve of a hook 19, which represents a response part. In the cylinder 28 is made of shaped channels (not shown).

The device operates as follows. Receiver 1 is set through the centralizer 3 clutch 2 on ESP in the housing under the action of tension force logging information cable installed seat 5 and the housing 1 when obosom contact 17. For the implementation of snagging on logging information cable omit the second cable head 27, with swirling it on the thread cylinder 28, which is made of profiled channels, limiting movement of the sleeve hook 19 within the cylinder 28. When lowering the cylinder 28 on the body of the pin 17 is an emphasis in the upper bounding surface on which the sleeve of a hook 19 can be turned and fixed in a certain position. At this point is the connection of the rod 25 with the contacts of the second cable head 27 and thus is an electrical circuit of the measuring channel. After you close the electrical circuit for the implementation of the test layers at different depths, the measuring device 26 raise in the following sequence: logging the communication cable 8, with a fixed second cable head 27 and the cylinder 28, rise up. Sleeve of a hook 19 enters the thrust surface of the cylinder 28 and lifts the body of the pin 17, the housing 12, the nipple 7 and logging the communication cable 8, which is fixed to the measuring device 26.

After research design is lowered. The nipple 7 sits on the tapered surface of the seat 5, and the cylinder 28 starts to fall, and the body of the pin 17 remains in a fixed position, due to the emphasis Kon is e.g. in the saddle 5. Sleeve of a hook 19 falls on the guide surface and, turning, rests on the cylinder 28. To effect the separation of the contact cable head 27 with the cylinder 28 begin to raise up the sleeve of a hook 19 falls on the guide surface and enters the exit channel of the cylinder 28. The cylinder 28 is designed so that the process of coupling and uncoupling with the sleeve of a hook 19 is semi-automatically with the reciprocating movement of the logging data cable 8 along the tubing 4. Coupling and automatic coupling is performed repeatedly in research wells, and whether ESP works or not.

In the course of the study wells may experience an abnormal situation associated with the breakage of logging information cable. In the event of breakage of the logging data cable 8 there is a leakage of the working fluid in the casing 1 into the wellbore on the channel where you installed the seal 9. This case provides a check valve 11, which passes through a wireline communication cable 8 and which locks the cavity with seals 9 and eliminates leakage of the working fluid.

Automatic coupling device for the study of wells containing cylinder connected to the sleeve of a hook, a spring, characterized in that the cylinder is made napravlyaushaya mate with the possibility of engagement with the sleeve, a hook, which is installed on the body of the contact, fixed in the housing, which is a cylindrical part, so that the sleeve is pressed against the spring case, while in the case of the contact set fluoropolymer insulating tube and a rod associated with a cable clamp connected to the first cable head through logging data cable, which is suspended from the measuring device and which is connected with a check valve, and a cylinder mounted on the second cable head.



 

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2 cl, 3 dwg, 1 ex

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1 dwg

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EFFECT: optimized well operation.

2 dwg

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